This paper gives an overview of the main safety problems of modern APCSs and formulates the challenges to overcome them. The aim of the work was to review the safety of modern APCSs. Emergencies associated with consistent erroneous actions of operating personnel must prevent control systems. Until the early 2000s, APCSs were considered to be the safest systems, due to their operation according to a rigid and verified algorithm, the human factor could not affect them. To enable remote control and monitoring, an internet connection became necessary. Due to an increase in the number of cyber-attacks on automated process control systems, an unprotected Internet connection had become insecure, and a new opportunity to influence the system from the outside had appeared. The security and reliability of modern process control systems has become even more important.

Keywords: automated process control system, safety, vulnerability